Niagara Falls

"There reigns in this place a profound and terrifying obscurity, now and again
relieved by a flicker of light. Then you see the whole river, seemingly descending
on your head. It is difficult to describe the impression produced by this ray of
light, when having let you a moment glimpse the vast chaos which surrounds
you, it abandons you again amidst the darkness and fracas of the cataract."